Câu hỏi:
14/03/2020 575Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.
The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.
By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.
Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.
After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.
Large amounts of gases may be released from the Sun at the end of its life as a .
Đáp án chính xác
Câu hỏi trong đề:
20 Đề thi thử THPTQG môn Tiếng Anh cực hay có đáp án !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Giải bởi Vietjack
Đáp án B
“The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf”
Ta thấy mặt trời thải ra một lượng lớn khí ga khi nó chuyển từ ngôi sao khổng lồ màu đỏ sang sao lùn màu trắng vì vậy hiện tượng này xuất hiện ở cuối giai đoạn sao đỏ
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
- Janet: "Do you feel like going to the cinema this evening?"
- Susan: " _________."
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23/03/2020
34,385
Câu 2:
When the old school friends met, a lot of happy memories______ back.
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30,942
Câu 3:
Mark the letter A, B, C, or D on your answer sheet to indicate sentence that sentence that best combines each pair of sentences in the following questions
We've run out of tea.
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14/03/2020
30,460
Câu 4:
Mark the letter A, B, C, or D on your answer sheet to indicate sentence that is similar in meaning to the given one
"I will let you know the answer by the end of this week,” Tom said to Janet.
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14/03/2020
28,609
Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate sentence that sentence that best combines each pair of sentences in the following questions
The sooner we solve this problem, the better it will be for all concerned.
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14/03/2020
23,273
Câu 6:
Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Unlike many writings of her time, she was not preoccupied with morality.
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14/03/2020
22,160
Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate sentence that is similar in meaning to the given one
My friend told me, “If I were you, I would not smoke so much.”
Xem đáp án »
14/03/2020
21,264
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